JPH0716586U - Magnet generator rotor - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the workability of balance correction from being reduced by the reductor. In a rotor of a magneto-generator in which a plurality of magnets 20 are arranged on the inner circumference of a substantially bowl-shaped yoke 11 and a reluctor 13 is provided on a sidewall of the yoke 11 so as to project radially outward, a bottom of the yoke 11 is provided. A plurality of jig insertion holes 17 through which the jigs 43 and 44 are inserted when the magnets 20 are housed in the yoke and temporarily positioned on the wall are provided at intervals in the circumferential direction. Among the 17 groups of jig insertion holes, the size of the jig insertion hole located on a straight line passing through the rotation center of the yoke 11 of the reluctor 13 has a rotational balance of the reluctor 13 with respect to the sizes of other jig insertion holes. Has been changed in response to. [Effect] Since the rotational balance of the yoke 11 is preliminarily balanced regardless of the presence of the reluctor 13, when the rotational balance of the entire rotor of the magneto generator is corrected, the reluctor is omitted in the correction work. So it will be easier.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotor for a magnet generator, and more particularly to a technique for correcting a rotational balance, and more particularly, to a rotor effectively used for a rotor for a magnet generator mounted on a small or special vehicle such as a motorcycle or a buggy. .

[0002]

[Prior art]

 Generally, in a small or special vehicle such as a motorcycle or a buggy, a magnet generator using a permanent magnet (hereinafter referred to as a magnet) such as a ferrite magnet may be used.

In this type of magnet generator, a rotor is configured by arranging and fixing a plurality of magnets at an equal interval on the inner circumference of a yoke, and coils are wound around a plurality of radial positions on a core. The rotor is driven by the engine to rotate around the electron emitter, so that an electromotive force is induced in each magnetic pole coil of the electron emitter. Has been done.

Conventionally, as a rotor used in such a magnet generator, a reluctor is bulged outward in the radial direction on a side wall of a yoke, and the passage of the reductor is detected by a magnetic pickup sensor. Accordingly, there is a device configured to obtain an ignition timing signal.

On the other hand, in the conventional rotor of this type of magnet generator, the magnet generator is caused by variations in the products of the magnets arranged in the circumferential direction, variations in the thickness of the yoke itself, and the like. Since the rotation balance of the rotor as a whole becomes unbalanced, after the assembly work, the rotation balance is corrected by using a drill or the like to perforate the wall surface or side wall surface of the yoke.

[0006]

[Problems to be solved by the device]

 However, in the rotor of the magneto generator in which the reluctor is bulged and formed in the yoke, the rotor is largely unbalanced by the amount of the reluctor when the yoke is used alone, so the rotation balance of the rotor of the magneto generator as a whole is large. When the above-mentioned correction work is combined with other unbalanced conditions, the conditions for correction (mass and position) increase, and the workability of balance correction deteriorates.

An object of the present invention is to provide a rotor of a magnet generator capable of avoiding deterioration of workability of balance correction due to the presence of a reluctor.

[0008]

[Means for Solving the Problems]

 In the rotor of the magneto-generator according to the present invention, a plurality of magnets are arranged at intervals on the inner circumference of a substantially bowl-shaped yoke, and a reluctor is radially outwardly provided on a part of the side wall of the yoke. In the rotor of the magnet generator protruding from the yoke, there are a plurality of jig insertion holes into which the jig is inserted when the magnets are housed in the yoke and temporarily positioned, and the bottom wall of the yoke is provided. The jig insertion holes are opened at intervals in the circumferential direction, and the size of the jig insertion hole located on the straight line passing through the reluctor and the center of rotation of the yoke among these jig insertion holes has the same size as other jig insertion holes. The feature is that the size of the hole is changed according to the rotation balance of the reluctor mentioned above.

[0009]

[Action]

 According to the above-described means, the size of the jig insertion hole at the position facing the reluctor is preset so as to eliminate the imbalance caused by the reluctor, so that the rotation balance of the yoke alone does not depend on the presence of the reluctor. , It is in a state of almost equilibrium beforehand. Therefore, after the rotor of the magneto-generator is assembled, when the overall rotation balance is modified, the modification work does not need to take the reluctant into account, and thus is simple.

[0010]

Embodiments FIGS. 1A, 1B and 1C are partially cut perspective views showing a method for manufacturing a rotor of a magneto generator according to an embodiment of the present invention. FIG. 2 shows a yoke, (a) is a partially omitted plan view, (b) is a front sectional view taken along line bb of (a), and (c) is a partially omitted bottom view. FIG. 3 shows a cover, (a) is a partially omitted plan view, (b) is a front sectional view, and (c) is a partially omitted bottom view. 4A and 4B show a rotor of a magneto-generator according to an embodiment of the present invention. FIG. 4A is a plan view and FIG. 4B is a front sectional view taken along the line bb of FIG. FIG. 5 and subsequent drawings are explanatory views showing each step in the manufacturing method of the rotor of the magneto-generator which is one embodiment of the present invention.

In this embodiment, the rotor of the magneto-generator according to the present invention comprises a yoke, a plurality of magnets, and a cover. The yoke 11 is integrally formed in a substantially bowl shape whose upper surface is opened and whose lower surface is closed by a magnetic material, and the reluctor 13 has a predetermined width in the circumferential direction and the axial direction on the cylindrical wall 12 of the cylindrical shape. It is projected in the direction. Therefore, the rotation balance of the yoke 11 as a single item is largely unbalanced due to the reluctor 13.

A shaft hole 15 for inserting a boss (not shown) that directly connects the rotor to the engine is opened in the lower surface blocking wall 14 of the yoke 11. A pair of circular holes 16 used for mounting a yoke positioning jig, which will be described later, are provided outside the shaft hole 15 of the lower surface closing wall 14 of the yoke 11, and each of them has a phase difference of 180 degrees on a concentric circle. Has been drilled. Further, in the outer peripheral portion of the closing wall 14 of the yoke 11, a plurality of elliptical holes 17 (in this embodiment, 12 holes) as jig insertion holes for inserting a magnet axial direction setting jig to be described later are inserted. ), They are provided at equal intervals in the circumferential direction on a concentric circle. In the present embodiment, of the plurality of elliptical holes 17, the two elliptical holes 17A and 17B located in the vicinity of the retractor 13 are longer in the circumferential direction than the remaining elliptical holes 17. Each of them is configured so that the imbalance of the rotational balance due to the amount of the reluctor 13 is corrected by the lengthened length.

Further, on the bottom surface of the closing wall 14 of the yoke 11, there are provided a plurality of convex portions 18 (8 in this embodiment) for fixing the cover, a group of circular holes 16 and a group of elliptical holes 17. They are arranged at equal intervals in the circumferential direction on concentric circles between them, and a part of the closing wall 14 is pushed up from the outer surface so as to project inward in the axial direction. The convex portion 18 will be described later. It is configured so that it can be caulked by being inserted into a fixing hole formed in the cover.

The closing wall 14 of the yoke 11 is provided with a plurality of female screw holes 19 for attaching a cooling fan, which are provided at equal intervals in the circumferential direction on a concentric circle near a group of circular holes 16. Further, no winding and crimping margin is provided on the opening edge of the cylindrical wall 12 of the yoke 11.

The magnet 20 has a height equal to or less than the depth of the yoke 11, and is integrally formed into a substantially rectangular parallelepiped having a circular arc shape curved along the inner circumference of the yoke 11 in the width direction. At the left and right ends of the arc-shaped inner peripheral surface (hereinafter referred to as the abdominal surface) 21 of the magnet 20, the inclined surface portions 23 approach the outer peripheral surface (hereinafter referred to as the rear surface) 22 as they approach the left and right ends. Has been formed. The rising side surfaces 24 and 24 on both sides are formed so as to be perpendicular to a tangent to the normal line passing through the center of the yoke 11, and the upper surface 25 and the lower surface 26 are formed parallel to each other.

The cover 30 is made of a metal material such as a thin iron plate and is integrally formed by drawing and pressing. The cover 30 is formed into a substantially cylindrical shape that is press-fitted into a cylinder formed by a group of magnets 20 described later. . That is, the cover 30 has a circular cylindrical wall 31, and the outer diameter of the cylindrical wall 31 is formed to be slightly larger than the inner diameter of the cylinder formed by the magnet 20 group. An outer flange portion 32 is formed at one end (hereinafter, referred to as an upper end) of the cylindrical wall 31 of the cover 30 in a circular donut shape protruding outward in the radial direction.

An inner flange 33 is integrally formed in a circular donut shape at the lower end of the cylindrical wall 31 of the cover 30. The inner diameter of the inner flange portion 33 is smaller than the arrangement diameter of the convex portion 18 group arranged on the yoke 11 and is set to be equal to or slightly larger than the arrangement diameter of the circular holes 16, 16. In the radial middle portion of the inner collar portion 33, there are the same number of fixing holes 34 as the convex portions 18 group of the yoke 11 (8 in this embodiment), and each of the fixing holes 34 matches the convex portion 18 group of the yoke 11. The fixing holes 34 are formed so as to be inserted into the respective convex portions 18.

Further, a plurality of notches 35 (eight in this embodiment) are formed in a substantially semi-circular shape on the inner peripheral edge of the inner flange 33, and the group of notches 35 make up the yoke 11. The group of circular holes 16 and the group of female screw holes 19 can be appropriately escaped. Further, a rigidity-imparting portion 36 is bent and formed over the entire circumference including the cutout portion 35 at the inner peripheral edge of the inner flange portion 33. The rigidity imparting portion 36 is formed by bending the inner peripheral edge portion of the inner flange portion 33 inward in the axial direction to a constant height over the entire circumference by drawing or the like, and imparts sufficient rigidity when press-fitting the cover 30 described later. It is supposed to do.

Next, a detailed description will be given of the structure of the rotor of the magneto-generator, which is an embodiment of the present invention, by explaining the manufacturing method using the respective components having the above-mentioned structure.

First, as shown in FIGS. 1A and 5, the yoke 11 is set on the base 41 of the rotor manufacturing apparatus 40 of the magneto-generator. At this time, a pair of yoke positioning jigs 42, 42 is inserted into the pair of circular holes 16, 16 in the yoke 11, respectively. Further, a magnet circumferential direction positioning jig (hereinafter referred to as a magnet first jig) 43 and a magnet axial direction setting jig (hereinafter referred to as a magnet second jig) 44 are provided in the group of oblong holes 17. Each is inserted.

Here, the magnet first jig 43 group and the magnet second jig 44 group are floatingly supported on the base 41 by the springs 45, respectively, so that they can move in the upward and downward directions. There is. The same number of magnet first jigs 43 groups (four in this embodiment) as the magnets 20 are arranged at equal intervals in the circumferential direction on a circle concentric with the array diameter of the oblong holes 17 group. There is. Further, shoulder portions 43a, 43a are formed on both side edges in the circumferential direction of each magnet first jig 43, respectively. In the other magnet second jig 44 group, the number (8 in this embodiment) obtained by subtracting the number of magnets 20 from the number of elliptic hole 17 groups is on the concentric circle with the array diameter of the elliptic hole 17 group. In each of the first jigs 43, they are arranged on both sides of the first jig 43.

Subsequently, as shown in FIGS. 1A and 5, a plurality (four in this embodiment) of magnets 20 are arranged in a circular ring shape in the yoke 11. It At this time, the lower surface 26 of the magnet 20 is placed on each of the two second jigs 44 with the back surface 22 abutting on the inner peripheral surface of the yoke 11, and both side surfaces 24, 24 is engaged with the side surfaces of the first jigs 43, 43 on both sides, and the end portion of the lower surface 26 is engaged with the shoulder portions 43a, 43a of the first jigs 43, 43, respectively. In this state, the magnet 20 is positioned in the circumferential direction by the first jig 43. Further, the magnet 20 is positioned at the upper limit by the second jigs 44, 44 and is in a state of being floated and supported in the vertical direction.

Next, as shown in FIGS. 1A and 6, inside the group of magnets 20 annularly aligned with the inner circumference of the yoke 11, the circular inner surface formed by the groups of magnets 20 is formed. The cover 30 formed in a cylindrical shape having an outer diameter slightly larger than the diameter of is inserted by the fitting tool 50. With this press-fitting, the portions of the cover 30 that face each other between the adjacent magnets 20, 20 on the cylindrical wall 31 are bulged into the respective spaces, and the circumferential positioning portions 37 of the magnets are respectively formed. It is formed .

Here, the outer diameter of the fitting tool 50 is formed in a two-step cylindrical shape having a small diameter on the lower side and a large diameter on the upper side, and the small diameter portion 51 on the lower side is smaller than the inner diameter of the cylindrical wall 31 of the cover 30. The diameter of the upper large-diameter portion 52 is slightly smaller than that of the outer flange 32 of the cover 30.

The fitting tool 50 has the same number of yoke positioning holes 53 as the circular holes 16 (two holes in the present embodiment), which are provided in the axial direction. The yoke positioning jigs 42 are relatively inserted into the respective yoke positioning holes 53, whereby circumferential positioning of the fitting 50, the yoke 11 and the magnet 20 group is secured.

On the lower surface of the small-diameter portion 51 of the fitting tool 50, the same number of insertion holes 54 as the convex portions 18 of the yoke 11 (in this embodiment, eight) are provided in the axial direction. Further, an annular groove 55 is recessed in the lower surface of the small diameter portion 51 of the fitting tool 50 so as to accommodate the rigidity imparting portion 36 of the cover 30. According to the above-described positioning state, the protrusions 18 are inserted into the insertion holes 54, and the rigidity imparting portion 36 is inserted into the annular groove 55, respectively, and the fitting tool 50 to the protrusions 18 and the rigidity imparting portion 35 is inserted. Interference has been avoided.

When the cover 30 is press-fitted into the group of magnets 20 up to the final stroke, the inner flange portion 33 comes into contact with the bottom surface of the closing wall 14 of the yoke 11. In this state, the fixing holes 34 formed in the inner side flange portion 33 are fitted into the fixing convex portions 18 protruding from the bottom surface of the closing wall 14 of the yoke 11.

In this state, as shown in FIGS. 1B and 7, the caulking tool 56 is inserted into the insertion hole 54 of the fitting tool 50, so that the caulking tool 56 is inserted into the fixing hole 34 of the cover 30. The protruding end of the convex portion 18 of the yoke 11 is caulked. The cover 30 is fixed to the closing wall 14 of the yoke 11 in a circular ring shape along the entire circumference of the inner flange 33 by the group of the protrusions 18 after the caulking process.

Next, after the fitting tool 50 is removed, the plastic device 60 is inserted inside the cover 30 as shown in FIGS. 1C and 8. By this plasticizing device 60, the magnet axial positioning portion 38 is provided on the inner flange portion 33 side of the cylindrical wall 31 of the cover 30, and the magnet lower surface 26 is provided in the space between the lower surface 26 of the magnet 20 group and the yoke closing wall 14. Is formed into a circular ring shape along with, or at least the lower surface of the magnet is also strongly extruded.

Here, the plastic device 60 includes a main body arranged on the lower side and an operation tool arranged on the upper side. When the plastic device 60 is inserted inside the cover 30, the main body 61 is pressed against the bottom wall 14 of the yoke 11, and a plurality of overhanging tools 62 are provided on the bottom of the main body 61. Bases (four in this embodiment) and radial lines (cross in this embodiment) are arranged and slidably mounted inside and outside in the radial direction. The radially outer end surface of each projecting tool 62 faces the cylindrical wall 31 of the cover 30 from the inside in a normal line.

A driven-side inclined surface portion 63, which is one of the stroke conversion means, is provided so as to project vertically upward at the radially inner end portion of each of the overhanging tools 62, and the upper end portion of each inclined surface portion 63 is provided. The inclined surface is formed so as to rise outward. A compression spring 64 is interposed between the radially outer surface of each inclined surface portion 63 and the radially inner surface of the main body 61 in a power storage state. Therefore, each of the projecting tools 62 is constantly urged inward in the radial direction by the spring 64 and is in a state of standing by at the retracted position. Further, each guide hole 65 is vertically formed right above each inclined surface portion 63 of the main body 61.

On the other hand, the operation tool 66 is fitted in the main body 61 slidably in the vertical direction. The outer diameter of the operating tool 66 is formed in a two-step cylindrical shape with a small diameter on the lower side and a large diameter on the upper side, and the outer diameter of the small diameter portion 67 on the lower side is slightly smaller than the inner diameter of the cylindrical wall 31 of the cover 30. The outer diameter of the upper large diameter portion 68 is formed to be substantially the same as the outer diameter of the outer collar portion 32 of the cover 30.

A guide recess 69 is concentrically arranged on the lower surface of the small-diameter portion 67 of the operation tool 66 and is recessed. The outer peripheral surface of the main body 61 is slidably fitted into the inner peripheral surface of the guide recess 69. It is being touched. On the lower surface in the guide concave portion 69, each driving side inclined surface portion 70 which is the other of the stroke converting means is arranged so as to face the driven side inclined surface portion 63, and is projected downward in the vertical direction. An inclined surface is formed at the lower end of each driving side inclined surface portion 70 so as to rise outward. The driving-side inclined surface portions 70 are slidably fitted in the guide holes 65 of the main body 61, and the downward-facing inclined surfaces of the driving-side inclined surface portions 70 correspond to the upward-facing inclined surfaces of the driven-side inclined surface portions 63, respectively. It is slidably attached.

When the operating tool 66 is lowered in a state in which each of the overhanging tools 62 faces the bottom of the cylindrical wall 31 of the cover 30, the driven side inclined surface portion 63 relatively slides on the driving side inclined surface portion 70. As a result, each of the projecting tools 62 is pushed outward in the radial direction. By the outward movement of each overhanging member 62, the inner flange portion side of the cylindrical wall 31 of the cover 30 bulges radially outward, so that the axial positioning portion 38 of the magnet is formed in an annular shape.

Simultaneously with the bulging of the axial positioning portion 38 of the cover 30, the lower surface of the large diameter portion 68 of the operating tool 66 pushes down the outer flange portion 32 of the cover 30, so that the axial positioning portion 38 of the cover 30 is provided. It does not have to be formed by stretching only the portion between the magnet end surface 26 and the inner flange portion 33, but is formed with a surplus of the cylinder wall 31 being pushed down. Therefore, due to the bulging of the axial positioning portion 38, the inner flange portion 33 of the cover 30 is torn off, or the axial positioning portion 38 becomes an extremely thin portion, and the magnet fixing strength decreases. There is nothing to do.

On the other hand, when the lower surface of the outer flange portion 32 of the cover 30 that is pushed down contacts the upper surface 25 of each magnet 20, each magnet 20 is pushed upward by each second magnet jig 44. Since they are supported in a floating manner, the heights of the respective magnets 20 are aligned at the lower surface of the outer flange portion 32 of the cover 30, that is, the lower surface of the large diameter portion 62 of the operating tool 66.

After the axial positioning portion 38 is formed, the operating tool 66 is raised. When the operating tool 66 is raised, the respective overhanging tools 62 are retracted radially inward by the respective springs 64. Then, the operating tool 66 and the plastic device 60 of the main body 61 are extracted upward from the inside of the cover 30. Next, the yoke 11 is reset from above the base 41.

Through the above steps, the rotor of the magneto generator shown in FIG. 4 is manufactured. That is, the magnets 20 are sandwiched and fixed between the outer flange portion 32 and the axial positioning portion 38 in a state where the heights of the magnets 20 are aligned on the lower surface of the outer collar portion 32 of the cover 30.

After that, the rotor of the magneto generator is subjected to the rotation balance correction work as a whole. In this operation, the rotation balance of the yoke 11 as a single unit is such that, although the reluctor 13 is bulged, the two oblong holes 17A located near the reluctor 13 among the plurality of oblong holes 17 and Since the unbalance of the reluctor 13 is eliminated by forming the circumferential length of 17B to be long, it is not necessary to correct the unbalance of the reluctor 13.

Here, since the ratio of the unbalance of the reluctor 13 to the rotational balance of the yoke 11 alone is relatively large, the reluctance of the reluctor 13 is corrected in the work of correcting the rotational balance of the entire rotor of the magneto generator. If the imbalance is corrected at the same time, other imbalances due to variations in the product of the magnet 20 and variations in the thickness of the yoke 11 and the cover will be superimposed on the imbalance of the reluctor 13, so the rotation of the magnet generator will be reduced. The number of man-hours for correcting the rotational balance of the child as a whole increases. That is, when the work of correcting the rotational balance of the entire rotor of the magnet generator is repeated, the frequency of the work of searching the balance correction position and the correction mass by repeating the rotation of the rotor many times increases. Extremely low.

However, in the present embodiment, since the unbalance due to the reluctor 13 does not intervene in the correction work of the rotational balance of the entire rotor of the magneto generator, the entire rotor of the magneto generator does not exist. The work of correcting the rotational balance of is extremely easy, and the workability is dramatically improved. By the way, since the jig insertion hole 17 is formed in the outermost peripheral portion of the closing wall 14 of the yoke 11, the jig insertion holes 17A, 17B and the other insertion holes 17 are sufficiently unbalanced even if the difference in size is small. Can be modified.

It is needless to say that the present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the scope of the invention.

For example, in order to eliminate the imbalance of the reluctor 13 in the yoke 11, the jig insertion holes 17 A and 17 B located in the vicinity of the reluctor 13 are not limited to being largely deformed, but among the plurality of jig insertion holes 17 The jig insertion hole 17 facing the reluctor 13 with the center of rotation interposed therebetween may be made smaller than the other insertion holes. In addition, the jig insertion hole has different sizes in the circumferential direction in the present embodiment, but it is configured so that the circumferential length is the same and the radial width is changed. Good. Further, a plurality of jig insertion holes in the vicinity of a straight line passing through the reluctor and the center of rotation may be changed.

[0044]

[Effect of device]

 As described above, according to the present invention, since the unbalance due to the reluctor does not intervene when correcting the rotation balance of the entire rotor of the magneto generator, the rotation balance of the entire rotor of the magnet generator is corrected. The work becomes extremely easy and the workability can be dramatically improved.

[Brief description of drawings]

1A and 1B show a method of manufacturing a rotor of a magneto generator according to an embodiment of the present invention, in which FIG. 1A is a partially cutaway exploded perspective view showing a cover insertion step, and FIG. FIG. 6C is a partially cut perspective view showing a process, and FIG. 7C is a partially cut perspective view showing a cover bulging process.

FIG. 2 shows a yoke, (a) is a partially omitted plan view, (b) is a front sectional view taken along line bb of (a),
(C) is a partially omitted bottom view.

FIG. 3 shows a cover, (a) is a partially omitted plan view, (b) is a front sectional view, and (c) is a partially omitted bottom view.

4A and 4B show a rotor of a magneto-generator according to an embodiment of the present invention, in which FIG. 4A is a plan view and FIG. 4B is bb of FIG.
It is a front sectional view which follows a line.

FIG. 5 is an enlarged partial front sectional view showing a magnet positioning step.

FIG. 6 is an enlarged partial front sectional view showing a cover press-fitting step.

FIG. 7 is a front sectional view showing a fixing step of the cover.

FIG. 8 is a front sectional view showing a step of forming a magnet axial direction positioning portion of the cover.

[Explanation of symbols]

11 ... Yoke, 12 ... Cylinder wall, 13 ... Reactor, 14 ... Closure wall, 15 ... Shaft hole, 16 ... Circular hole, 17 ... Elliptical hole (jig insertion hole), 18 ... Convex part, 19 ... Female screw hole, 20 ... Magnet, 21 ... Arc-shaped inner peripheral surface (belly surface), 22 ... Outer peripheral surface (back surface), 23 ... Inclined surface portion, 24 ... Standing side surface, 2
5 ... Upper surface, 26 ... Lower surface, 30 ... Cover, 31 ... Cylinder wall, 3
2 ... Outer collar part, 33 ... Inner collar part, 34 ... Fixing hole, 35 ...
Notch part, 36 ... Stiffness imparting part, 37 ... Circumferential positioning part,
38 ... Axial positioning unit, 40 ... Manufacturing device for rotor of magnet generator and manufacturing method thereof, 41 ... Base, 42 ... Yoke positioning jig, 43 ... Magnet circumferential positioning jig (first jig for magnet) , 43a ... Shoulder part, 44 ... Magnet axial positioning jig (second jig for magnet), 45 ... Spring, 50 ... Fitting tool, 51 ... Small diameter part, 52 ... Large diameter part, 53 ... Yoke positioning hole, 54 ... Insertion hole, 55 ... Annular groove, 60 ... Plastic device, 61 ... Main body, 6
2 ... Overhanging tool, 63 ... Driven side inclined surface portion (stroke converting means), 64 ... Compression spring, 65 ... Guide hole, 6
6 ... Operation tool, 67 ... Small diameter part, 68 ... Large diameter part, 69 ... Guide concave part, 70 ... Driving side inclined surface (stroke conversion means).

Claims (1)

[Scope of utility model registration request] 1. A magnet generator in which a plurality of magnets are arranged at intervals on an inner circumference of a substantially bowl-shaped yoke, and a reluctor is provided on a part of a side wall of the yoke so as to project radially outward. In the rotor of the machine, a plurality of jig insertion holes into which a jig is inserted when the magnets are housed in the yoke and are temporarily positioned are provided at circumferential intervals in the bottom wall of the yoke. Among the jig insertion holes, the size of the jig insertion hole located on the straight line passing through the reluctor and the rotation center of the yoke is larger than that of the other jig insertion holes. A rotor for a magnet generator, which is changed according to the rotational balance.